ISI

ISI (uncountable)

1. (telecommunications) Abbreviation of intersymbol interference.
2. (hematology) Initialism of international sensitivity index.

   Coordinate term: INR

3. (economics) Initialism of import substitution industrialization.
   • 1992, Edwin Williamson, The Penguin History of Latin America, London; New York: Penguin Books, →ISBN, page 336:

     Since ISI had been embraced by military juntas and urban interest-groups as an alternative to the oligarchic export-economy, government planners discriminated against exports by imposing heavy duties and pouring resources into manufacturing industry in preference to agriculture.

ISI

1. (Pakistan) Initialism of Inter-Services Intelligence.
2. Initialism of Islamic State in Iraq.
3. (US politics) Initialism of Intercollegiate Studies Institute, a conservative educational organization.
   • 2025 November 20, J. Oliver Conroy, “White nationalist Nick Fuentes is exposing a civil war among US Republicans: ‘We look like clowns’”, in The Guardian‎^[1], →ISSN, archived from the original on 5 December 2025:

     The turmoil has engulfed more and more of the right. Earlier this month, two board members of the Intercollegiate Studies Institute (ISI), another influential conservative group, resigned […] . They noted that ISI recently unveiled a new podcast whose first guest, Curtis Yarvin, has defended slavery, said that white people have inherently higher IQs than black people and called for the American republic to be replaced with a dictatorship.

• IIs, Iis, IIS

• IPA^(key): /ˈi.si/, [ˈi.si]
• Homophone: isi

ISI (plural ISI-ISI)

1. (education) acronym of institut seni Indonesia (“Indonesian Institute of Arts”)

• “ISI”, in Kamus Besar Bahasa Indonesia [Great Dictionary of the Indonesian Language] (in Indonesian), Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016